The graph of a quadratic function is called a parabola. There are two key pieces of information needed to graph a parabola. You need to know the vertex, which is the high or low point of the graph, and the roots, which is where the graph crosses or touches the x–axis. To learn more about finding the vertex of a parabola, click here for the vertex lesson. To learn more about finding the roots, click here to go to a lesson on solving a quadratic. In addition to knowing the vertex and the roots, it will also be helpful to plot specific points to get a more accurate graph. To learn more about graphing parabolas on the calculator, click here to go to a lesson on graphing functions. 

